MOT and LSD
 

OK so just been to go for an MOT and the chap asked if it had an LSD - I said "yes" and they said their special machine ( Tapey?) was off being calibrated and they don't want to break the diff.

I've since read that this doesn't apply to the diff on the S2000 as it's a torsen diff and behaves like an open diff unless power is applied. Never had this problem before and never seen a single post that states "MOT ruined my diff" so pretty sure there's nothing to worry about, but thought it was worth asking anyway - is it OK for normal roller brake testing on the S2000 where they spin up the wheels and apply brakes?

When I worked in a Honda dealer all S2ks and any 4wd cars were tested using a Tapley meter, however since it has been tested in a subsequent employers workshop it has been tested using the Tapley and on the rollers, I have been told that it the fact that the rollers are driving the wheels rather than the other way that might cause damage, awaiting someone to confirm this still.

Can't be any different to rolling down hill using engine breaking, if a car can't do that without destroying the diff then it's pretty useless.

I was under the impression they spin up one wheel at a time or at least independently and that's what might cause issues with LSDs, anyway the Tapley meter is back from calibration today so he'll be testing on a drive rather than the rollers anyway.

straight pass, no advisories - but what would you expect :)